I can't sneeze (singular), I always end up sneezing (plural). Sometimes, it gets so bad that I have leave the classroom so that I don't interrupt the class... so embarrassing.
Telling my friends that I've a crush with the girl next door to my house, only to found out that she's a cousin to one of my friends that I talked with.
One time, I went to a fast food place with my friends, and since I got to the door first, I was going to open it for them to go in. It was the kind of door that you pull towards you to open. I wasn't paying attention to where my feet where so when I opened the door, it hit my foot really hard, but everyone behind me thought that I had opened it and hit my face. They didn't believe me when I said that it only hit my foot because they know how clumsy I am.
That reminds me, I accidentally set a batch of cookies on fire in my sister's oven. In my defense, her oven is actually a gateway into a hellfire dimension. I set the temperature for 350, I'm pretty sure the temperature in the oven reached over 500.
Whenever I recommend a movie for my friends to watch, and at the end, no one likes it but me.
"*sniff* Evil Dead is a classic, you people just don't understand me!"